package com.lzj.demo.collection.string;

public class StringBuilder01 {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3};
        String s = arrayToString(arr);
        System.out.println("s"+s);

    }

    public static String arrayToString(int[] arr) {
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length-1) {
                sb.append(arr[i]);
            } else {
                sb.append(arr[i]).append(",");

            }
        }
            sb.append("]");
            String s = sb.toString();

            return s;

    }

}
